The X-Planes: X-1 to X-45 (Midland Publishing)

[Vahe231991]

There's a book by Jay Miller about X-series experimental aircraft titled X-Planes: X-1 to X-45. It can be bought at these links:
https://www.amazon.com/X-Planes-X-1-X-45-3rd/dp/1857801091
https://www.ebay.com/p/2146028

Although dated because several X-series designations have been allocated since it was published in 2001, this book includes the X-15 and several X-planes designed to serve a technology demonstrators for spaceplanes or test aerodynamic data for them, including the X-20 Dynasoar, X-30, X-33, X-34, X-37, X-38, X-40, X-41, X-42, and X-43. Although the Convair X-11 and X-12 test vehicles were not built because the original five-engine design for the Atlas ICBM had to be reworked as a three-engine design following H-bomb testing at the Bikini Atoll in the 1950s, attributes of their design found their way into the Atlas A and Atlas B.)